What vital sign change is expected with hypokalemia?

• A. Increased heart rate
• B. Decreased blood pressure
• C. Elevated respiratory rate
• D. Increased urine production

Answer: (A)

In hypokalemia, which is a condition characterized by low levels of potassium in the blood, an expected vital sign change is an increased heart rate. This occurs because potassium plays a crucial role in the electrical conduction system of the heart, helping to maintain a normal heart rhythm. When potassium levels are low, it can lead to dysrhythmias, which may manifest as tachycardia (an increased heart rate). The heart compensates for the ineffective contractions and disturbances in electrical activity, often resulting in a faster pulse. Understanding this relationship highlights the significance of potassium in cardiac function and emphasizes the importance of monitoring potassium levels in patients at risk for hypokalemia.